Machine for drilling iron



UNITED STATES PATENT FFICE.

i "22 JOHN H. CURRIER AND VING H. TABER, OF FAIRHAVEN, MASSACHUSETTS.

MACHINE FOR DRILLING IRON.

Specification of Letters Patent No. 1,224, dated July 8, 1839.

To all whom t may con/,fem

Be it known that we, JOHN H. CURRIER and l/ING H. TABER, of Fairhaven,in the county of Bristol. and State of Massachusetts, have invented anew and useful Machine for Drilling Iron, Steel, Brass, and the LikeSubstances; and we do hereby declare that the following is a full andexact description.

The nature of our invention consists in combining the powers of thelever and screw so as to force forward the chuck and drill while it isturned by a crank.

To enable others skilled in the art to make and use our invention, wewill proceed to describe its construction and operation.

We make our machine of soft cast iron and it consists of a base and twoperpendiculars, as shown at A, B, C, in accompanying drawings. Extendingfrom the perpendicular B, is a short arm D, upon which is a lever E,with a pin running through each, and forming the fulcrum. Through thetop of this lever and the top of the perpendicular B, runs a wroughtiron screw F with a thread cut in the perpendicular and smooth where itpasses through the lever being loose that the lever may not cramp whenpassing back or forward. To the end of the screw passing through thelever is attacheda wheel made fast at the hub G. Through theperpendiculars runs a mandrel H, which receives the drill I, and to theouter end is attached a crank K. We make this mandrel larger where itpasses through the perpendicular' C, at the middle otl which is anoffset when it passes though the lower end of the lever. Each side ofthe lower end of the lever is a collar L, M. le oval. the end of thelever playing against the collars to avoid friction; on the base we fita sliding Ibearer N, which we fasten at any convenient distance by meansoi' a pin. 7e make the machine tast in a vise or by screwing it upon abench, and work it by placing the article to be drilled against thebearer N and turn the crank with one hand and press up the drill withthe other b v turning the wheel G. I

In drilling holes one inch and under, we make the base and perpendicularA B 22 inches in length, the lever 9, the longest end 6, and the otherparts in proportion.

What we claim as our invention and desire to secure by Letters Patentis- The method of forcing in and drawing out the drill by thecombination of the drillstock, lever and screw in the manner described.

JOHN H. CUBRIEB. W'ING H. TABER.

Wvitnesses to J. H. Curriers signature:

SAMUEL SMALL, L. D. F LEMING. litnesses to Wing H. Taber:

HENRY H. CRAPo, DAvID SHIvERIoK.

